De vries



March 3, 1964 M. DE VRIES 3,123,281

PACKAGING MATERIAL Filed Jan. 25, 1961 QNX m VEN MA sd RussI ATTORNEYS United States Patent O The invention relates to a method for manufacturing packaging material, more particularly a pouch for packaging tobacco and suchlike aromatic substances, a printed sheet of paper being surrounded by a wrapper, the edges of which are sealed during the formation of the pouch.

In the conventional method of making such a pouch, a printed sheet of paper is slid into a polyethylene tube. The plastic covered paper thus obtained is folded into the desired form, after which the edges of the polyethylene are Welded together by heating. In this conventional method, various parts of the manipulations must be performed manually, and since the resulting pouches do not all have the same shape, difiiculties are encountered in the automatic filling of the pouches With tobacco.

Polyethylene has as a packaging material many advantages, among which are the durability of the package, the fact that it feels pleasant and supple to the user and gives a passable protection of the packaged product. A suitable print can be applied on the sheet of paper and it is the sheet of paper which gives the necessary solidity to the package.

Packaging could be effected automatically, for example if a polyethylene layer were applied on the paper by extrusion. This combination is too stift" in the hands of the user and has the additional disadvantage that the sheet of paper treated in this way is difficult to print, the imprint then being applied on the outside of the package which is disadvantageous and makes it necessary to provide a high quality imprint.

It is the object of the invention to provide a method forv manufacturing packaging material of the kind described, in which said difficulties are removed, and in which the material can be used in an automatic packaging machine.

According to the invention this is obtained by applying to the paper on the side which has not been printed a protecting layer securely fastened to it, the printed side being provided in various locations with an adhesive adhering to the sheet of paper, a plastic film thus being applied to the sheet of paper, said film being broader than the sheet of paper and being locally adhered by means of the adhesive.

The basic material made in this way can be used by automatic packaging machine without any difliculty, the tobacco being also packaged during the folding of the pouch, after which the projecting edges of the plastic coating are adhered together. The packaging machine can cut off the combined material in a straight line locally, for example near the flap, due to which a better appearance is obtained. The adhering of the layers to one another is not disturbed by said cutting.

The protecting layer on that side of the sheet of paper which is not printed, may be made of a plastic, but a metal film can be employed as well.

The invention will now be more fully explained with reference to the drawing.

In the drawing:

FIG. 1 shows a cross section through a breadth of material manufactured in accordance with the method of the invention; and

FIG. 2 shows a top view of said breadth.

In manufacturing the packaging material according to the invention a paper layer in the form of a sheet of paper 1 which may be provided at its upper side with ICC an imprint or other indication is used as a starting material. A long breadth of paper, as diagrammatically shtwn in FIG. 2, could also be used as a starting materia The sheet of paper is provided with a protecting coating or layer 2 on the side which is not printed, for example in the manner in which a metal foil or plastic film is united to a paper backing as described in U.S. Patent No. 2,400,390. Said coating 2 may consists of a plastic, but can be a layer of a metal foil, for example an aluminum foil. Said coating or layer can be adhered entirely or locally to the sheet of paper. It is important that the coating or layer 2 is not slidable relative to the sheet of paper 1. The breadth of the coating or layer may be equal to or larger than that of the sheet of paper. The sheet of paper is provided on its printed side with adhesive layers 3, 4, 5, 6 and 7. As appears clearly from FIG. 2, the adhesive is applied only in restricted or localized areas. Naturally the adhesive should adhere to the sheet of paper. A plastic protecting film 8 is now applied on the layers of adhesive and adheres to the restricted areas. The plastic film 8 is, as appears clearly from the FIGURES 1 and 2, broader than the sheet of paper 1 with its protecting layer 2. Notches 9, 10 and 11, 12 can previously be made in the sheet of paper 1 in order to readily enable the strip of material to be folded later on. The sheet of paper has such a percentage of moisture that the paper does not fold or folds only to a limited degree when the pouch is folded and filled with tobacco. After folding the pouch and putting in the tobacco, which is effected in a packaging machine, the projecting edges of the film 8 are welded together. Because the material according to the invention behaves like so-called single layer material, it can easily be used in an automatic packaging machine. Because the protecting film 8 is fixed to the sheet of paper 1 at only a very few places, the whole object feels pleasant and the package is very supple. The material can be wound on a roller, if said material is in the position as shown in FIG. 2, and coming from the roller it can be handled on the packaging machine. Cutting off the material so as to give it a length suitable for one single pouch can be effected in the packaging machine and in an area such as areas 5 and 7 having the adhesion thereon. In that case the adhesion of the layers with each other will not be disturbed. Without departing from the scope of the invention, it is also possible to leave the sheet of paper unprinted, and to apply a print to the later inner side of the film 8. Further the adhesive areas 3, 4, S, 6 and 7 can be interrupted at places in order to form air ducts. Owing to the provision of the air ducts the material feels still more supple.

I claim:

1. A packaging material for packaging finely divided materials, particularly tobacco, comprising a paper layer having one side thereof printed and adapted to face the outside of a package, a metal foil protecting coating on the unprinted side of said paper layer, said metal foil protecting coating covered side of said paper layer being adapted to form the inside of a package, restricted areas of adhesive on the printed side of said paper, and a plastic film having an area greater than the area of said layer of paper on said adhesive and adhered to said paper layer by said adhesive such that the over-all area of the paper and plastic film are fixed relative to each other and unadhered areas can move relative to each other for giving the material good suppleness and feel, the edges of said plastic film projecting beyond the paper layer and being adapted to be sealed to each other for forming a package with the metal foil protecting coating covered side of said paper layer on the inside of the package and said plastic iilm on the outside of the package.

2. A packaging material for packaging finely divided materials, particularly tobacco, comprising a paper layer having one side thereof printed and adapted to face the outside of a package, a plastic protecting coating on the unprinted side of said paper layer, said plastic protecting coating covered side of said paper layer being adapted to form the inside of a package, restricted areas of adhesive on the printed side of said paper, and a plastic lm having an area greater than the area of said layer of paper on said adhesive and adhered to said paper layer by said adhesive such that the over-all area of the paper and plastic film are fixed relative to each other and unadhered areas can move relative to each other for giving the material good Suppleness and feel, the edges of said plastic lm projecting beyond the paper layer and being adapted to be sealed to each other for forming a package with the plastic protecting coating covered side of said paper layer on the inside 0r" the package and Said plastic lrn on the outside of the package.

References Cited in the file of this patent UNITED STATES PATENTS Elias Nov. 1, Clune Feb. 13, Taylor July 7, Smithwick Nov. 14, Gardiner Oct. 23, Yates May 12, Baer Apr. 10, Clunan May 14, Draheim Aug. 15, Hurst Jan. 22, Wharton Apr. 30, Marsh Aug. 11,

FOREIGN PATENTS Canada May 1, 

1. A PACKAGING MATERIAL FOR PACKAGING FINELY DIVIDED MATERIALS, PARTICULARLY TOBACCO, COMPRISING A PAPER LAYER HAVING ONE SIDE THEREOF PRINTED AND ADAPTED TO FACE THE OUTSIDE OF THE PACKAGE, A METAL FOIL PROTECTING COATING ON THE UNPRINTED SIDE OF SAID PAPER LAYER, SAID METAL FOIL PROTECTING COATING COVERED SIDE OF SAID PAPER LAYER BEING ADAPTED TO FORM THE INSIDE OF A PACKAGE, RESTRICTED AREAS OF ADHESIVE ON THE PRINTED SIDE OF SAID PAPER, AND A PLASTIC FILM HAVING AN AREA GREATER THAN THE AREA OF SAID LAYER OF PAPER ON SAID ADHESIVE AND ADHERED TO SAID PAPER LAYER BY SAID ADHESIVE SUCH THAT THE OVER-ALL AREA OF THE PAPER AND PLASTIC FILM ARE FIXED RELATIVE TO EACH OTHER AND UNADHERED AREAS CAN MOVE RELATIVE TO EACH OTHER FOR GIVING THE MATERIAL GOOD SUPPLENESS AND FEEL, THE EDGES OF SAID PLASTIC FILM PROJECTING BEYONG THE PAPER LAYER AND BEING ADAPTED TO BE SEALED TO EACH OTHER FOR FORMING A PACKAGE WITH THE METAL FOIL PROTECTING COATING COVERED SIDE OF SAID PAPER LAYER ON THE INSIDE OF THE PACKAGE AND SAID PLASTIC FILM ON THE OUTSIDE OF THE PACKAGE. 